The opening of more and more Na⁺ channels during depolarization A) is the result of the sodium-potassium exchange pump. B) is an example of a positive feedback cycle. C) is possible only if K⁺ channels remain closed. D) is the cause of the afterpotential. E) is an example of a negative feedback cycle.

Question

Quizplus · Accepted Answer

The opening of more sodium channels during depolarization leads to further depolarization, which opens even more sodium channels. This is a classic example of a positive feedback cycle, where the initial stimulus is amplified by the response.

The Opening of More and More Na+ Channels During Depolarization

The Opening of More and More Na⁺ Channels During Depolarization